@misc{021dd162-59e3-4c43-946d-6f70674c4ae7,
abstract = {During the last years, costs for power interruptions to customers have increased and<br/><br>
from 2011 a new legislation will not allow power interruptions longer than 24 hours.<br/><br>
Electric power utilities are facing important costs to decrease the likelihood of power<br/><br>
interruption in the future.<br/><br>
Island operation of distribution systems is not commonly employed in Sweden, also<br/><br>
for safety reasons. The penetration of distributed generation into distribution<br/><br>
networks is expected to grow in the next years; induction generators will represent a<br/><br>
large amount of distributed generation and may dominate in local areas.<br/><br>
In this scenario, island operation of distribution networks with distributed generation<br/><br>
can be regarded as a means to reduce power interruptions to final customers and<br/><br>
improve power supply security. There are still many barriers to be removed before<br/><br>
island operation of distribution networks can be accepted. Beside safety reasons, the<br/><br>
quality of the delivered power may be a concern.<br/><br>
With induction generators operating in an island system, voltage and frequency<br/><br>
control issues must be addressed; moreover safe operation requires that the protection<br/><br>
system be adequately adapted so that any fault in the distribution system operating in<br/><br>
island is promptly detected and cleared.<br/><br>
In this report, the behaviour of the induction generator in island operation under<br/><br>
faulted conditions is investigated through simulations and some protection issues are<br/><br>
addressed. But first a brief overview on earthing practices of distribution networks in<br/><br>
Sweden is performed.},
author = {Sulla, Francesco},
language = {eng},
publisher = {ARRAY(0xa21a520)},
series = {TEIE},
title = {Island Operation of the Induction Generator - Fault Currents and Protection},
volume = {7220},
year = {2007},
}